Route · SEA → PSC · 2020–2025 BTS data
Seattle to Pasco/Kennewick/Richland
The SEA–PSC corridor (Seattle, WA → Pasco/Kennewick/Richland, WA) runs ahead of the national average, served by 5 carriers across roughly 172 miles.
Data updated 2026-06-13
- 85.9%
- On-time
- +6.9 pts
- vs US avg
- 63 min
- Delay when late
- 13,307
- Flights
Cancelled
0.6%
Best Month
Nov 2024 90%
Worst Month
Feb 2025 68%
Distance
172 mi
Carriers
5
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 159 | 26 | 1 | 1 | AS,OO |
| Nov 2025 | 163 | 20 | 7 | 0 | OO,AS |
| Oct 2025 | 213 | 33 | 2 | 0 | AS,OO |
| Sep 2025 | 167 | 23 | 0 | 0 | OO,AS |
| Aug 2025 | 180 | 23 | 2 | 0 | OO,AS |
| Jul 2025 | 185 | 33 | 0 | 1 | AS,OO |
| Jun 2025 | 191 | 45 | 0 | 0 | AS,OO |
| May 2025 | 235 | 46 | 1 | 0 | AS,OO |
| Apr 2025 | 147 | 26 | 0 | 0 | OO,AS |
| Mar 2025 | 133 | 23 | 0 | 0 | AS,OO |
| Feb 2025 | 122 | 39 | 0 | 0 | AS,OO |
| Jan 2025 | 152 | 30 | 0 | 0 | AS,OO |
| Dec 2024 | 190 | 33 | 1 | 0 | AS,OO |
| Nov 2024 | 155 | 15 | 1 | 1 | OO,AS |
| Oct 2024 | 143 | 18 | 0 | 0 | AS,OO |
| Sep 2024 | 116 | 22 | 0 | 0 | OO,AS |
| Aug 2024 | 157 | 45 | 0 | 0 | AS,OO |
| Jul 2024 | 177 | 41 | 0 | 0 | AS,OO |
| Jun 2024 | 166 | 45 | 1 | 0 | AS,OO |
| May 2024 | 169 | 36 | 0 | 0 | AS,OO |
| Apr 2024 | 144 | 26 | 0 | 0 | AS,OO |
| Mar 2024 | 119 | 20 | 0 | 0 | AS,OO |
| Feb 2024 | 110 | 16 | 0 | 0 | AS,OO |
| Jan 2024 | 125 | 33 | 7 | 1 | AS,OO |
Cancellation Rate
0.6%
23 of 3,818 flights
Diversion Rate
0.1%
4 of 3,818 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Origin airport →PSC - Pasco/Kennewick/Richland
Full on-time, delay-cause, and seasonal performance for Pasco/Kennewick/Richland, WA.
Destination airport →Compare the two airports
See SEA and PSC side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SEA–PSC.
Routes with a similar on-time rate
What the Data Says About SEA to PSC
Seattle to Pasco/Kennewick/Richland (SEA to PSC) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.9% on-time rate across 13,307 flights, with delays that do happen averaging 62.7 minutes. The corridor runs roughly 172 miles and is served by 5 carriers. Over the most recent 24 months, 23 of 3,818 flights were cancelled (0.6%) and 4 diverted (0.1%).
The monthly split is wide on this route: Nov 2024 posted the strongest performance at 90% on-time, while Feb 2025 came in at just 68% - a 22-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from SEA to PSC? ▼
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.